Can I put an EE sim into an Orange Iphone?

So, I wanna order a used Iphone 4s off Ebay but the only thing is, it's locked to Orange and I have an EE sim. Will I be able to insert my EE sim into the phone. If not, will unlocking the phone damage the phone in anyway. It's just that I'vehad past experience where I've unlocked my phone and it's just stopped working.

You need to unlock the locked iPhone 4S… Otherwise it will not accept other simcards.To unlock an iPhone remote unlocking method is the best method. You can get the unlocking service from network provider, sometimes they deny. In that case you can get the remote unlocking service from trusted third party like http://www.theunlockarena.com/apple-iphone-4s/rs13wp9/ and follow their free unlocking instructions to easily unlock from the locked network.